Helpful, thanks. stateGroups were a puzzle, though. How to combine states? Which state names to use throughout the mxml? Where do these stateGroups pay off? I built an experiment, and the news is good: JohnHicks dot com slash wp

I can switch between on state and the other.When we click on "Need to register" I expected to see things like "First Name" and "Last Name". Their location do exist as an space is allocated in the layout but they stay invisible.